ZnO-Only Sunscreen is a high-performance formula using zinc oxide as its only filter. The combination of HallBrite® BHB and SolaStay® S1 helps to optimize dispersion quality and prevent ROS generation. Natural emollient and structuring agents Olivem® VS Feel, Oliwax® LC and Biochemica® Shea Butter Organic help to greenify the package and add moisturizing benefits. The final product is non-whitening with a smooth, non-greasy skin-feel. In vitro testing demonstrates SPF 54 and PFA (PPD) 18, UVA1/UV = 0.82 and critical wavelength 376 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Isopropyl Myristate | HALLSTAR ® IPM | 5.00 | Emollient |
| Diethylhexyl 2,6-Naphthalate | SolaFresh™ | 10.00 | Multifunctional Sunscreen Solvent | |
| Butyloctyl Salicylate | HallBrite® BHB* | 5.00 | Sunscreen Solvent / Emollient | |
| Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer | |
| Polyhydroxystearic Acid | 0.44 | Dispersing Agent | ||
| B | Zinc Oxide [Zinc Oxide], Triethoxycaprylylsilane (30-200 nm primary particle size) | 20.00 | UV Filter / Sunscreen Agent | |
| C | VP/Eicosene Copolymer | 0.75 | Film Former | |
| Cetyl Palmitate, Sorbitan Palmitate, Sorbitan Olivate | Oliwax ® LC | 2.00 | Co-Emulsifier / Liquid Crystal Promoter | |
| Potassium Cetyl Phosphate | 1.00 | Emulsifier | ||
| Cetearyl Alcohol, Cetyl Palmitate, Sorbitan Palmitate, Sorbitan Oleate | Olivem® VS Feel | 2.50 | Co-Emulsifier / Liquid Crystal Maker | |
| D | Glycerin | 2.50 | Humectant | |
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| E | Water (Aqua) | up to 100 | Volatile Carrier | |
| Trisodium Ethylenediamine Disuccinate (37% active) | 0.20 | Chelating Agent | ||
| F | Preservative | a.n. | Preservative |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A and start mixing. Add phase B with mixing. Heat to 80°C and then add phase C. |
| 2 | To the main vessel add premixture of phase D, start mixing and add phase E. Heat phase DE to 75 - 80°C with mixing. |
| 3 | When both phases are homogeneous and at their designated temperatures, slowly add phase ABC to phase DE with prop mixing. |
| 4 | After 5 minute mixing, homogenize batch for 5 minutes, and then start cooling with central mixing. |
| 5 | when batch is < 50°C, add phase F with mixing |
| 6 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | White lotion |
| Viscosity (20 rpm, Brk, RV DV-II, T-D, after 24h at room temperature; mPa∙s) | 5000 - 7500 |
| pH (as is) | 7.5 - 9.0 |
*Patented and Patent Pending
The information presented herein is believed to be accurate and reliable, but no warranty or guarantee, expressed or implied, is made regarding the information or the performance of any product. Further, nothing contained herein shall be taken as any inducement or recommendation to use, manufacture or sell that may infringe any patents or any other proprietary rights now or hereafter in existence, nor to imply compliance with any regulatory requirements
The Hallstar Company - 120 South Riverside Plaza Suite 1620 - Chicago, IL 60606-3911 USA hallstarbeauty.com